KfromGER

hi

i am from germany and it semms that this board can help me a lot.

at first, i have a honda civic coupe D16z6 and a complete rebuild engine in it with 9:0 turbo pistons, Eagle ESP rods, complete new valvetrain (a little bit ported), stock Crank, stock Cam, Blockguard installed.

at this time i drive without a turbo but the turbo is behind me and i will put that thing on it.

the turbo is from a nissan S13 1,8 liter engine. i have new, 450ccm injectors, a "ready to chip" p28 obd1 ECU.

i have no wideband !!!

now to my questions. i have a compressor map from this turbocharger and i do not understand some things. i know what pressure ratio is but i dont know how much air flow come out of my engine...

Ps: have anyone tested the uberdata rom editor ? thats my next problem

KfromGER

whats about the turbo ? is it good for the d16z6 ?

do you have a basemap for me ?

must i change my MAP sensor ? i will drive 12 psi (i think the turbo is set to 12 psi)

volumeking333

maybe this can help you

The volume air flow (VAF), measured here in cubic feet per minute (cfm), is a linear function of engine displacement (here in CI), compression cycles per minute (RPM/2), and volumetric efficiency (VE), as shown in the following equation.
VAF = (CI/172 x (RPM/2) x VE

KfromGER

ok, it seems to me that my engine have a air/flow ratio of 30 lb/min (406 cf/m) ?? is that possible for a d16z6 ?

the turbo puts 12 psi at ? RPM

from some basemaps from garrett is a gt2860 a good choice for the d16z6 engine. a gt2560 seems to me too small. i think this gt2560 cuts up before the RPM on the limitter.

someone tells me, the nissan s13 turbo is like a t3 .48 A/R. is this correct ?

please tell me when i am wrong.

edit: i have found that: 1 HP approx equals 1.45 CFM

so my car has 125 HP and than it must have 181.25 CFM so it must have an Air flow Ratio of 13,50 ? then is this gt28 much too big.

i am confused abaout this Airflow an Pressure. Pleas help me out

volumeking333

post up the compressor maps your using, and what you used for Volumetric Effieciency numbers.

i can try to help you out

RJwaggs

This also has a lot of helpful information. Taken from the FAQ.

http://www.stealth316.com/2-3s-compflowmaps.htm

This place as well:

http://www.turbomustangs.com/turbofaq.php

As well as this site:

http://forcedinductions.com/help.htm

And if you're even more interested after those, then Maximum boost and a few other books are helpful.

robus

how to read compressor maps
http://www.sohchonda.com/forums/inde...showtopic=6683

robus

turbo calculator
http://not2fast.wryday.com/turbo/glo...rbo_calc.shtml

KfromGER

thanks for this links, that helps me a lot.

i think that the nissan T25 A/R .48 a little bit too small is for me. i will try a A/R .60 T25. my goal is 250-280 HP.